An automatic alignment technique for multiple rangefinders

Kenta Fujiwara; Koichiro Yamauchi; Yukio Sato

doi:10.1117/12.767522

25 February 2008 An automatic alignment technique for multiple rangefinders

Kenta Fujiwara, Koichiro Yamauchi, Yukio Sato

Proceedings Volume 6805, Three-Dimensional Image Capture and Applications 2008; 68050A (2008) https://doi.org/10.1117/12.767522
Event: Electronic Imaging, 2008, San Jose, California, United States

Abstract

An automatic alignment technique for multiple rangefinders is proposed. We obtain 3D data of object using a rangefinder which is composed of a camera and a projector. Generally, we can only obtain partial figure when we measure an object from one direction. Therefore, we can acquire all around configuration by measuring an object from multiple viewpoint. The data obtained with rangefinder exists independent camera coordinate system each other. It is needed to integrate each range maps to acquire all around figure. Heretofore, we integrate multiple range maps by estimating camera parameter using calibration rig whose scale is known. Calibration rig has many feature points which have world coordinate each. Camera parameter is estimated from the relation between camera coordinate and world coordinate of feature points on the rig. However, we cannot identify the measuring position when we measure a part of the rig, because the pattern painted on the rig is monotonous pattern. In this paper, we use "De Bruijn Sequence pattern" on the calibration rig. This pattern enables us to identify the measuring spot wherever we measure the rig, and enable us to automatically integrate multiple range maps.

Citation Download Citation

Kenta Fujiwara, Koichiro Yamauchi, and Yukio Sato "An automatic alignment technique for multiple rangefinders", Proc. SPIE 6805, Three-Dimensional Image Capture and Applications 2008, 68050A (25 February 2008); https://doi.org/10.1117/12.767522

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